78results about How to "Simple post-maintenance" patented technology

The utility model discloses precise cutting and shaping equipment based on an automobile brake pad steel backing, which comprises a bottom plate, a cutting device and a shaping device, the working frame is located at the top of the bottom plate and fixedly connected with the bottom plate; the protection assembly is located at the top of the working frame and fixedly connected with the working frame, and the protection assembly is used for isolation protection of workers; the utility model relates to the technical field of cutting equipment. According to the precise cutting and shaping equipment based on the automobile brake pad steel backing, a protection assembly is arranged, an adjusting telescopic rod and an extension frame are directly arranged on the surface of a working frame, the adjusting telescopic rod drives the extension frame to extend and expand towards the two sides in the working process, and hands are directly prevented from entering the working frame; the hand of a worker is prevented from entering the core working area of the laser cutting body, the overall safety is improved, and the reliability of the device is further improved through the arrangement of a magnetic plate.

The utility model discloses a two-stage rectifying tower for bromine extraction, which comprises a base, two groups of fixing frames arranged on the upper end face of the base, a rectifying tower body arranged inside the top ends of the fixing frames, a reflux inlet arranged at the bottom end of the rectifying tower body, a reflux pipe arranged at the bottom end of the reflux inlet, and a delivery pump arranged at one end of the reflux pipe. And a first flow guide pipe is arranged at the output end of the conveying pump. The finished product discharge pipe is arranged at the bottom end of the rectifying tower body, the reflux inlet is formed in the bottom end of the finished product discharge pipe, and the reflux pipe is arranged at the output end of the reflux inlet, so that liquid at the bottom end of the rectifying tower body flows back into the reboiler by the reflux pipe through the first flow guide pipe, and the phenomenon that the liquid flows back into the reboiler during distillation is avoided; and the residual bromine in the cooled liquid is discharged and discarded as a prepared liquid, so that the resource waste is caused.

The utility model relates to the technical field of concentrators, and discloses a center transmission type concentrator which comprises a motor, a stirring and scraping unit arranged on an output shaft of the motor, a concentration tank arranged on the outer side of the motor, a first rectangular frame and a second rectangular frame fixedly connected to the outer wall surface of the concentration tank, and a lifting plate arranged at the top end of the concentration tank, the motor is fixedly mounted on the lifting plate, a lifting assembly for lifting the lifting plate is arranged on one side of the first rectangular frame, and the stirring and scraping unit comprises a rotating rod, a rectangular frame and a scraping plate. In the concentration process, materials can be stirred and scraped by arranging a motor and a stirring and scraping unit, the motor and the stirring and scraping unit can be integrally lifted by arranging a first rectangular frame, a second rectangular frame and a lifting assembly, the practicability is better, a first gear and a second gear are movably meshed, a worm and a worm wheel are used for transmission, and the stirring and scraping efficiency is improved. And the stability of the device is better, and the practicability of the device is improved through the reasonable structural design.

The invention discloses a multi-angle adjustable lighting street lamp which comprises a lamp pole barrel, a mounting seat is rotatably connected to the lamp pole barrel, a lamp arm is rotatably connected to the mounting seat, and a gear knob for controlling the brightness of the street lamp is arranged on the lamp arm; the deflection assembly, the first rotating assembly, the second rotating assembly and the adjusting mechanism are all arranged in the lamp pole barrel. Through mutual cooperation of the lamp pole cylinder, the mounting base, the lamp arm, the gear knob, the deflection assembly, the first rotating assembly, the second rotating assembly, the adjusting mechanism and the transmission assembly, the adjusting assembly works to drive different deflection assemblies, the first rotating assembly and the second rotating assembly to move, so that adjustment of the lighting street lamp in different directions and at different angles is achieved; the lighting lamp is simple and convenient to operate and easy to maintain in the later period, and when the lamp arm deflects, the brightness of the street lamp on the lamp arm can be adjusted through the transmission assembly, so that the adjusted lighting lamp can still achieve a good lighting effect.

The invention provides a variable control mechanism of a novel hydraulic motor. The variable control mechanism comprises a direct-current servo motor installed on the hydraulic motor and a lead screw assembly located in the hydraulic motor and driven by the direct-current servo motor. The lead screw assembly comprises a valve sleeve installed in the hydraulic motor, a lead screw used for controlling the opening and closing degree of the first oil inlet is arranged in the valve sleeve, and a motor swing angle driving cylinder capable of moving in the hydraulic motor under the action that the lead screw controls the opening and closing degree of the first oil inlet is arranged on the outer surface of the valve sleeve. The hydraulic motor has the following beneficial effects that the direct-current servo motor drives the lead screw to rotate, the opening degree of a first oil inlet in the valve sleeve and the opening degree of a second oil outlet in the motor swing angle driving cylinder can be controlled, and the motor swing angle driving cylinder can move in the hydraulic motor; therefore, the shifting block can shift the motor swash plate to adjust the displacement of the hydraulic motor so as to achieve the purpose of randomly controlling the displacement of the motor.

The utility model discloses a liquid discharging device which comprises a leakage-proof disc, a water discharging box and a water pumping device. The communication pipeline comprises a water pumping connector connected to the water pumping device, a first connector connected to the leakage-proof disc and a second connector connected to the drainage tank; the normally open pneumatic valve is arranged on the first connecting channel; the normally closed pneumatic valve is arranged on the second connecting channel; and the ventilation device is respectively connected with the normally-open pneumatic valve and the normally-closed pneumatic valve. The water pumping device is controlled by the control device to pump out waste water of the leakage-proof disc and the drainage box, accumulated liquid of the leakage-proof disc can be effectively reduced through the water pumping device, and the water-saving device is simple in structure, easy to maintain in the later period and capable of saving time and labor.

The utility model relates to the field of oral liquid production and processing, and discloses bottle body separation equipment which comprises a conveying device, and the conveying device comprises a main transmission belt device, a first separation transmission belt device, a second separation transmission belt device and a short transmission belt. And the separation assembly comprises stand columns, a moving frame and a driving assembly, an intercepting plate is further arranged between the two stand columns, and a linkage unit is further arranged between the driving assembly and the intercepting plate. The separating assembly and the moving frame are arranged to drive the short transmission belt to conduct arc-shaped reciprocating motion, separating in the bottle conveying process is achieved, the linkage unit is arranged, lifting of the intercepting plate can be controlled, seamless connection of intercepting and flow dividing is achieved, the manual intervention requirement can be lowered through the design, only one driving device is needed, cost is lower, and operation is more convenient. The gear mechanical transmission structure is more stable, and later maintenance is simple.

The present invention provides a sewage treatment process based on glycogen-aggregating bacteria. The sewage treatment process of the present invention utilizes a biocage reactor and an ammonia nitrogen adsorption functional filler. The sewage to be treated stays in the biocage for 2-12 hours for sewage treatment. The sewage in the biocage alternates between an anaerobic and an aerobic environment at a frequency of every 10 minutes to every 3 hours. During the sewage's stay in the reactor, the pollutants in the sewage are effectively degraded by the biofilm, and finally meet the discharge standards. The sewage treatment process has low energy consumption and high efficiency in biological denitrification. Under the action of this method, a high-abundance glycogen-aggregating bacteria biofilm can be domesticated. Under the action of the high-abundance glycogen-aggregating bacteria biofilm, the ammonia nitrogen adsorption filler can repeatedly adsorb ammonia nitrogen pollutants in the sewage. Based on the high-abundance glycogen-aggregating bacteria biofilm, the BOD in the sewage can be used to the maximum extent for denitrification, thereby obtaining a higher total nitrogen removal rate in the treatment of low carbon-nitrogen ratio sewage. The treatment equipment required for the sewage treatment process of the present invention has a small footprint, low energy consumption, low operating cost, and simple later maintenance.

The utility model relates to the technical field of lamps, in particular to a metro station interval tunnel lighting lamp which comprises a lamp body, a lighting assembly, a wiring hole and a power source fixing piece, the lamp body comprises a lighting face and a mounting face, the lighting assembly facing the lighting face is arranged in the lamp body, the mounting face is provided with a mounting groove and the wiring hole, and the power source fixing piece is provided with a lock hole; the power supply module is pressed on the mounting surface by the power supply fixing piece, the power supply module is provided with a positioning hole, and the fastener penetrates through the lock hole and then is locked with the positioning hole; and one end of the butt joint male-female head is connected with the power supply module, and the other end passes through the wiring hole and then is connected with the lighting assembly. The subway station interval tunnel lighting lamp has the advantages of being easy to install and maintain in the later period, a traditional complex structure in the process of installing a power source is abandoned, and the power source can be installed, disassembled and maintained without tools.

The invention discloses a gear-holding type gear shifting manipulator of an automatic driving robot of an engineering machinery vehicle, and relates to the field of unmanned equipment and unmanned driving of engineering machinery vehicles. The mechanical arm comprises a mechanical arm base, a gear shifting lower rod assembly and a gear shifting upper rod assembly, the gear shifting upper rod assembly can achieve the gear shifting action of a forward gear, a neutral gear and a reverse gear of the engineering machine, and the gear shifting lower rod assembly can achieve the gear shifting action of a speed gear; the driving motor drives the ball screw in the electric cylinder to move, transmission is conducted through the connecting rod executing mechanism, accurate clamping and gear shifting operation of the gear-holding type gear shifting rod of the engineering mechanical vehicle are achieved, and meanwhile real-time monitoring and early warning of gear shifting action can be achieved through the displacement sensor. The technical blank that unmanned gear shifting of engineering machinery vehicle equipment is difficult to achieve quickly on the premise that existing engineering equipment does not need to be changed is filled, and the requirement for automatic gear shifting of the engineering machinery vehicle can be met. The gear shifting mechanism has the characteristics of compact structure, high gear shifting precision and adaptability to working conditions of engineering machinery.

This utility model discloses a fire suppression device for a nickel-metal hydride (NiMH) battery box under a train, including a box for housing the NiMH battery and a multi-parameter detector and a fire extinguishing device disposed within the box. The wiring terminals of the NiMH battery are located on the top of the NiMH battery body. The multi-parameter detector includes a housing and a smoke detector, a temperature detector, an H2 detector, and a CO detector located within the housing. The housing is fixed to the inner wall of the top plate of the box and is positioned facing the wiring terminals of the NiMH battery. The nozzle of the fire extinguishing device is positioned facing the NiMH battery. This utility model also provides a fire suppression system for a NiMH battery box under a train, including the aforementioned fire suppression device for a NiMH battery box under a train. By adopting the above technical solution and using a multi-parameter detector, the accuracy and response speed of early fire identification are significantly improved.

The utility model discloses a special waste gas and waste liquid recovery device for an oil measuring instrument, which comprises a base, a support is arranged on one side of the upper end face of the base, a storage tank is mounted inside the top end of the support, a sealing cover is arranged at the top end of the storage tank, and a liquid inlet pipe is arranged at the center of the top end of the sealing cover. A limiting piece is arranged at the upper position of the center of the interior of the storage tank, and a filter screen plate is installed in the limiting piece. The top end of the storage tank is sealed through the sealing cover, the liquid inlet pipe is arranged in the center of the top end of the sealing cover, waste liquid is conveyed into the storage tank through the liquid inlet pipe, the limiting piece is arranged at the position, close to the upper portion of the center, in the storage tank, and the filter screen plate is installed in the limiting piece; the waste liquid is filtered by the filter screen plate, so that particulate matters in the waste liquid are removed, and the particulate matters are prevented from existing in the waste liquid.

The cloth discharging mechanism with the cooling function and the cloth swinging function comprises a transmission roller, the two ends of the transmission roller are rotationally connected with the two sides of two swinging arms through first mounted bearings respectively, the transmission roller is rotationally arranged at the head end of a cloth discharging frame frame, one end of the transmission roller is connected with a speed reducer, and the other end of the speed reducer is connected with the driving end of a motor. The motor is fixed to the side face of the cloth outlet frame through the torque arm, the two swing arms are provided with the smooth cloth swing frame, one swing arm is connected with the transmission roller through the cloth swing transmission mechanism, the tensioning roller is rotationally arranged between the two sides of the cloth outlet frame, the transmission roller and the tensioning roller are connected through the conveying belt, and the air suction channel is formed in the middle of the cloth outlet frame. The air suction channel is connected with the fan, and the welding air suction channel in the middle of the cloth outlet frame is arranged between the transmission roller and the tensioning roller. The cloth placing frame is stable in driving, large in maintenance space, convenient in replacement of parts, simple in operation, small in overall occupied area, spacious and bright, and a unique inclined structure reserves enough space for underground operation.

The utility model relates to a drill floor face pipe pushing and supporting robot which comprises a moving trolley, a mechanical arm and a pushing and supporting clamp. The moving trolley can be movably mounted on a drill floor surface, and the mechanical arm is rotatably mounted on the moving trolley; the pushing clamp comprises a chuck and two clamp arms; the chuck is detachably installed at the tail end of the mechanical arm, the two clamp arms are installed on the chuck in a staggered mode, and the mechanical arm can drive the chuck to rotate to be switched between a receding state and a pushing state. The pipe pushing and supporting device has the beneficial effects that the pipe position change in the tripping engineering can be met through the moving trolley and the mechanical arm, and the pushing and supporting pliers in a detachable mounting form can enable the functions of the moving trolley and the mechanical arm to be more diversified and are not limited to pipe pushing and supporting operation; the pushing pliers are simpler and more reasonable in structure and easy to maintain in the later period.

The utility model discloses a fire hydrant with a quick connector, which comprises a fire hydrant body, a mounting head is arranged on one side of the fire hydrant body, a first limiting block is arranged on the inner side of one end of the mounting head, a second limiting block is arranged outside the mounting head, and a clamping head is arranged on the inner side of the mounting head. A clamping block is arranged outside one end of the clamping head and is of an L-shaped structure, and a limiting convex ring is arranged at one end of the mounting head. The clamping head is rotated clockwise, so that one end of a clamping block outside the clamping head is buckled at one end of a first limiting block, then a movable rod is pushed through a spring, the movable rod drives an annular limiting device to extend forwards, and meanwhile, the annular limiting device is installed outside a second limiting block through a limiting groove; the problems that the fire hydrant and the connector are inconvenient to install and the installation period is long are solved, and therefore the rescue efficiency is improved.

The invention belongs to the technical field of batteries, and particularly relates to an alkaline zinc-manganese flow battery and a manufacturing method thereof.The alkaline zinc-manganese flow battery comprises a battery module, an electrolyte storage tank, a circulating pump, a circulating pipe and a battery control system; the positive electrode electrolyte is a potassium manganate alkaline solution, the negative electrode electrolyte is a zinc oxide alkaline solution, and the alkaline zinc-manganese flow battery has the characteristics of large capacity, long cycle charge and discharge life, high charge and discharge efficiency, good stability, high safety, easiness in later maintenance and the like.

The utility model discloses an adjustable recyclable stackable pallet with guardrails, and relates to a pallet. The four corners of the base are fixed to the supporting square tubes through fixing bolts and limiting blocks, square tube guardrails are arranged on the three sides of each supporting square tube, a left opening and closing door and a right opening and closing door are arranged on one side edge of each supporting square tube through hinges, signboards are arranged below the middles of the four edges of the base, and forklift limiting feet are arranged on the two sides of each signboard. The two ends of the square tube guardrails opposite to the left opening and closing door and the right opening and closing door are connected with the supporting square tubes through movable bolts, and the second-layer base is placed on the first-layer supporting square tubes to be stacked and matched. The pallet is simple in structure, product damage caused by stacking due to the fact that old pallets are not provided with supporting guardrails is avoided, and meanwhile it is guaranteed that products cannot be damaged due to shaking in the transportation process due to the guardrails. Due to the fact that the forklift is arranged at the bottom for limiting, when goods are loaded and unloaded, it is guaranteed that stress of the forklift is centered, and the risk of accidents is reduced.

The utility model relates to a crimping tool for a grounding ring of an automobile pressure sensor. A press machine is arranged on the crimping tool for the grounding ring of the automobile pressure sensor; a pressing cylinder is fixed on the press machine; placing a to-be-mounted grounding ring, a trigger and a metal shell in the mold; one side of the mold is connected with a pressure pump structure; when the press machine drives the downward pressing air cylinder to press the grounding ring and the trigger which are placed in the mold and to be installed into the metal shell, the pressure pump structure conducts vacuum extraction to fix the grounding ring and the trigger. The grounding ring and the trigger are adsorbed in the upper die through vacuum, so that the technical problems that in the prior art, in the grounding ring crimping process, the grounding ring and the trigger often fall off, the grounding ring and the trigger are directly crushed, and products are scrapped are solved.

The present invention discloses a device and construction method for saline soil roadbed in seasonal frozen soil areas, belonging to the technical field of roadbed foundation, to solve the problem that saline soil roadbed in seasonal frozen soil areas is susceptible to frost heave, salt heave and dissolution, and the problem that the cushion layer is thick and difficult to compact when the traditional roadbed gravel soil is used as a permeable barrier layer. The device includes an earthwork roadbed, a heat stabilization facility, and a barrier facility. The barrier facility includes a medium-coarse sand lower protective layer, a modified desert sand barrier layer, and a medium-coarse sand upper protective layer arranged in sequence from bottom to top; the heat stabilization facility includes a bottom roadbed stabilization facility and an upper insulation facility. The bottom roadbed stabilization facility includes a lime soil compaction pile and a lime soil cushion layer arranged in sequence from bottom to top. The method includes the construction of a bottom roadbed stabilization facility, a barrier facility, an earthwork roadbed and an upper insulation facility, and a peripheral water-retaining wall. The present invention can maintain the long-term water, heat, and salt stability of the roadbed through the combination of structure and construction method; the cost is low, the construction process is less, and the maintenance is simple.

The utility model discloses a threading sealing device, which is arranged at joints of different environment grades and comprises a sealing assembly and a mounting shaft, the sealing assembly is arranged on one side in the mounting shaft and is provided with a through hole used for fixing a cable with a joint, the upper part of the sealing assembly is an elastic piece, and the elastic piece is provided with a through hole used for fixing the cable with the joint. The sealing assembly is further provided with a locking assembly used for extruding the elastic piece towards the periphery, and the upper portion of the sealing assembly is in interference fit with the mounting shaft through the locking assembly. The sealing device does not need to be sealed through sealant, installation is rapid and convenient, the sealing effect can be achieved when the sealing assembly is installed in place, and later maintenance is easy. The cables with different diameters can be sealed and fixed by replacing the elastic pieces with the threading holes with different sizes, and the application range is wide.

A corrugated plate node connecting device relates to the technical field of building structures, comprising a metal corrugated plate and a concrete plate, a I-steel beam, and a metal bottom plate support vertically welded and fixed to the top surface of the I-steel beam, a metal base is welded and connected to the upper surface of the metal bottom plate support, the metal base is vertically welded to the upper surface of the metal bottom plate support, a base channel is formed in the surface of the metal base, a bolt is vertically welded to the bottom surface of the corrugated plate, a 40°-50° chamfer is arranged on the lower end surface of the bolt, a locking mechanism is arranged in the metal base and matched with the bolt; the bolt-spring pin automatic locking mechanism replaces the traditional welding and bolt connection. The bolt is inserted into the base channel to trigger the automatic mechanical lock, the double-inclined-surface guide structure is matched to realize blind insertion, the installation efficiency is significantly improved, and the risk of welding defects on site is avoided.

This utility model discloses an auxiliary parking system for container trucks in a yard, comprising: a lateral positioning device, including a first laser emitter mounted on a rail-mounted gantry crane in the yard, which projects a lateral positioning baseline onto the ground. The lateral positioning baseline is in a straight line and is used to mark the side position of the container truck when parking; and a longitudinal positioning device, including a second laser emitter mounted on a rail-mounted gantry crane in the yard, which projects a longitudinal positioning baseline onto the ground. The longitudinal positioning baseline is in a straight line and is used to mark the parking position of the container truck near the front end. The lateral and longitudinal positioning baselines intersect perpendicularly on the ground to form a parking cross-shaped reference positioning system. This system enables container trucks to park quickly and accurately in the yard and improves the throughput of the yard.

The utility model discloses a wireless indoor positioning device based on radio frequency signals, which comprises a mounting plate, a plurality of groups of counter bores arranged inside two ends of the mounting plate, a shell arranged on the side of the mounting plate, a plurality of groups of heat dissipation holes arranged inside the bottom end of the shell, a plurality of groups of fixing frames arranged at the bottom end of the side of the shell, and a rotary driving part arranged at the center of each fixing frame. A fan assembly is arranged at the output end of the rotation driving piece. The multiple sets of heat dissipation holes are formed in the bottom end of the shell, and the multiple sets of fixing frames are arranged at the bottom end of the inner side of the shell, so that the rotating driving piece is fixed into the shell through the fixing frames, the rotating driving piece drives the fan assembly to rotate at a high speed, and then heat in the shell is driven to be discharged through the heat dissipation holes; the problem that a wireless indoor positioning device is poor in heat dissipation efficiency is solved.

The emergency oxygen inhalation mask with the monitoring function comprises a mask body, a protective rubber strip is arranged on the edge of the mask body, two sets of cushion blocks are symmetrically arranged on the two sides, close to the top end, of the interior of the mask body, a boss is arranged on one side of the mask body, and a controller is arranged in the center of the boss. And an oxygen concentration monitoring sensor is arranged at the output end of the controller. The controller is arranged in the center of the boss, the oxygen concentration monitoring sensor is arranged at the output end of the controller, the oxygen concentration monitoring sensor monitors the oxygen content of air in the mask body, the electric control valve is controlled through the controller, and the electric control valve controls the oxygen conveying amount. Discomfort of a patient caused by excessive oxygen content in the mask body due to too low oxygen content is avoided, and more reasonable, effective and scientific oxygen supply is guaranteed.

The invention discloses a bottle preform conveying device which comprises a tipping bucket mechanism, a bottle preform conveying mechanism, a bottle preform conveying mechanism, a bottle preform conveying mechanism and a bottle preform conveying mechanism. The horizontal conveying mechanism comprises a transfer hopper and a rotatable horizontal conveying belt, and the horizontal conveying belt is located below the tipping bucket box base; the lifting conveying mechanism comprises a rotatable lifting conveying belt which is obliquely arranged upwards, a feeding port in the bottom end of the lifting conveying belt is connected with the transfer hopper, and a discharging hopper is arranged at a discharging port in the top end of the lifting conveying belt. The device is suitable for the lifting and conveying operation of the oversized bottle blanks, the stability and safety of the lifting and conveying operation of the oversized bottle blanks can be improved, the device is high in automation degree and working efficiency, the production cost is greatly reduced, continuous and automatic conveying of the oversized bottle blanks can be achieved, the production efficiency of the oversized bottle blanks is greatly improved, and the production cost is reduced. Manual participation is not needed in the whole process, bottle blanks can be prevented from being polluted, the rejection rate of bottle blank products is greatly reduced, the product quality of the bottle blanks is ensured, and customer requirements can be met.

The utility model discloses a PP framework steel wire pipe which comprises a PP steel wire pipe body, multiple sets of corrugated bosses are arranged outside the PP steel wire pipe body at equal intervals, the corrugated bosses protrude out of the PP steel wire pipe body, each corrugated boss is of an annular structure, the top end of each corrugated boss is of an arc-shaped structure, a first framework is arranged on one side of the interior of each corrugated boss, and a second framework is arranged on the other side of the interior of each corrugated boss. The section of the first framework is of a trapezoidal structure, and the first framework is of an annular structure. The multiple sets of corrugated bosses are arranged outside the PP steel wire pipe body at equal intervals, the first frameworks and the second frameworks are symmetrically arranged on the two sides of the interiors of the corrugated bosses, and the first steel wires, the second steel wires, the third steel wires and the fourth steel wires are arranged in the PP steel wire pipe body, so that the bearing strength of the PP steel wire pipe body is better; the problem that due to the fact that the bearing strength of the PP steel wire pipe body is poor, the PP steel wire pipe body is prone to bursting when the internal pressure of the PP steel wire pipe body is too high is solved, and therefore the service life of the PP steel wire pipe body is longer.

A mask packaging machine includes: a frame, a bag taking mechanism, a bag holding mechanism, a material pushing device, and a sealing mechanism, characterized in that: the bag taking mechanism, the bag holding mechanism, the material pushing device, and the sealing mechanism are all fixed to the frame, the bag holding mechanism and the sealing mechanism are arranged on one side of the bag taking mechanism, the material pushing mechanism is arranged behind the bag holding mechanism, the bag taking mechanism is provided with a conveying component, the conveying component conveys the mask packaging bag to the bag holding mechanism to complete the bag holding work, the material pushing device clamps the stacked masks and puts them into the opened packaging bag, and the conveying component continues to convey the packaging bag containing the mask to the sealing mechanism to complete the sealing work. The various mechanisms of the present invention cooperate with each other to complete the packaging work and can ensure the smooth transmission of materials, the structure is simple, and the degree of automation is high. Furthermore, the present invention can carry out multiple groups of packaging work at the same time, the packaging efficiency is high, and it is easy to promote.

The utility model relates to a gangue screening device for coal conveying, which comprises a conveyor, the conveyor comprises a first rack, a transmission drum and a turnabout drum are arranged on the first rack, a conveyor belt is arranged on the turnabout drum and the transmission drum, a buffer mechanism is arranged on the first rack on the inner side of the conveyor belt, and the buffer mechanism comprises a buffer strip. A second rack is arranged on the first rack, an industrial camera is arranged on the second rack, a guide plate is arranged on the first rack, the included angle between the guide plate and the horizontal plane ranges from 30 degrees to 60 degrees, and a plurality of air injection holes are formed in the guide plate. The plurality of air injection holes are sequentially and uniformly distributed on the guide plate in a straight line along the direction parallel to the central axis of the turnabout drum, and a camera is arranged on one side, far away from the turnabout drum, of the guide plate. The position of the gangue on the conveying belt can be recognized, and the maintenance difficulty of recognition equipment is correspondingly reduced. The utility model has the advantages of convenient use and wide market prospect.

The coil winding device for the electric furnace transformer comprises a workbench, a support is arranged at one end of the upper end face of the workbench, mounting plates are symmetrically arranged on the two sides of one end of the upper end face of the support, a receding groove is formed in one end of the top of the support, and two sets of guide rails are arranged on the lower end face of one end of the support. A second rotating shaft is arranged on the side face of the mounting plate on one side, a lead screw is arranged at the output end of the second rotating shaft, a threaded sleeve is arranged outside the lead screw, a first moving frame is arranged at the bottom end of the threaded sleeve, and limiting grooves are symmetrically formed in the two sides of the interior of the first moving frame. The telescopic assembly in the first movable frame drives the second movable frame to longitudinally move, so that the second movable frame drives the first limiting roller to longitudinally adjust through the first mounting rod, and the problem that when the coil winding device is used for winding wires, the wires are prone to accumulation is solved; and therefore, the wire can be uniformly and neatly wound outside the winding roller.